[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=14745676#comment-14745676 ] Benjamin Lerer commented on CASSANDRA-10007: @Adam Holmberg could you check if the problem is still there? > Repeated rows in paged result > - > > Key: CASSANDRA-10007 > URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Adam Holmberg >Assignee: Benjamin Lerer > Labels: client-impacting > Fix For: 3.x > > Attachments: paging-test.py > > > We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It > seems that unbounded selects can return rows repeated at page boundaries. > Furthermore, the number of repeated rows seems to dither in count across > consecutive runs of the same query. > Does not reproduce on 2.2.0 and earlier. > I also noted that this behavior only manifests on multi-node clusters. > The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=14745703#comment-14745703 ] Adam Holmberg commented on CASSANDRA-10007: --- I can confirm using my repro script that it does not surface on cassandra-3.0 @7ca4db0a. I would be more comfortable if the root cause was understood so we know it's not lurking, but I understand resource constraints. > Repeated rows in paged result > - > > Key: CASSANDRA-10007 > URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Adam Holmberg >Assignee: Benjamin Lerer > Labels: client-impacting > Fix For: 3.x > > Attachments: paging-test.py > > > We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It > seems that unbounded selects can return rows repeated at page boundaries. > Furthermore, the number of repeated rows seems to dither in count across > consecutive runs of the same query. > Does not reproduce on 2.2.0 and earlier. > I also noted that this behavior only manifests on multi-node clusters. > The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=14745772#comment-14745772 ] Benjamin Lerer commented on CASSANDRA-10007: Thanks for looking at it. > Repeated rows in paged result > - > > Key: CASSANDRA-10007 > URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Adam Holmberg >Assignee: Benjamin Lerer > Labels: client-impacting > Fix For: 3.x > > Attachments: paging-test.py > > > We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It > seems that unbounded selects can return rows repeated at page boundaries. > Furthermore, the number of repeated rows seems to dither in count across > consecutive runs of the same query. > Does not reproduce on 2.2.0 and earlier. > I also noted that this behavior only manifests on multi-node clusters. > The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14711794#comment-14711794 ] Benjamin Lerer commented on CASSANDRA-10007: With alpha1, I can see one wrong number on the first run of the script. After the number are always the good ones. [~aholmber], [~steve.wang] can you do a test with the latest cassandra-3.0 and the latest python driver. I would like to be sure that the problem is really gone. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14709382#comment-14709382 ] Adam Holmberg commented on CASSANDRA-10007: --- Maybe something changed since alpha 1. I was specifically running on that release when I reported it. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14709387#comment-14709387 ] Benjamin Lerer commented on CASSANDRA-10007: I will try on alpha1 to see if I can reproduce it there. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14709351#comment-14709351 ] Benjamin Lerer commented on CASSANDRA-10007: I am still unable to reproduce the problem. Neither with the script nor with the java driver. I guess that we might have something different in our setups. I am using C* 3.0 HEAD, the the 3.0.0a1.post python driver and I am running on Windows 8.1 Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14702928#comment-14702928 ] Benjamin Lerer commented on CASSANDRA-10007: [~aholmber], [~steve.wang] I cannot reproduce the problem. Are you still able to reproduce it? Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14703413#comment-14703413 ] Steve Wang commented on CASSANDRA-10007: Hi Benjamin! Yes, I'm still able to reproduce this error. What I do is start a 3 node cluster in CCM and then run the paging-test.py script that Adam attached in this ticket. The first two values are as expected, but the next few values, which should be 100, oscillate between 104 and 103. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14662630#comment-14662630 ] Steve Wang commented on CASSANDRA-10007: Seems to work fine in dtest, as Adam and I both found to be true. The problem seems to be when the cluster is running on more than one node. There's a direct correlation between the number of nodes and the number of rows returned. In addition, there's an inverse relation between the fetch_size and the number_of_rows returned. For example, with: 5 nodes, fetch_size = 3 i get values from select* from test.test oscillating between 112 and 113, when the result should be 100. In addition, the error only seems to occur when there isn't a limit. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14660775#comment-14660775 ] Jonathan Ellis commented on CASSANDRA-10007: Is this the same as CASSANDRA-10010? Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14660780#comment-14660780 ] Tyler Hobbs commented on CASSANDRA-10007: - I don't think so. CASSANDRA-10010 is a pretty specific case, and the python script doesn't seem to be doing anything special. Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Assignee: Benjamin Lerer Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Commented] (CASSANDRA-10007) Repeated rows in paged result
[ https://issues.apache.org/jira/browse/CASSANDRA-10007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14660653#comment-14660653 ] Philip Thompson commented on CASSANDRA-10007: - [~rhatch], or [~steve.wang], can you see if this reproduces, or should reproduce in any of our paging tests? Repeated rows in paged result - Key: CASSANDRA-10007 URL: https://issues.apache.org/jira/browse/CASSANDRA-10007 Project: Cassandra Issue Type: Bug Components: Core Reporter: Adam Holmberg Labels: client-impacting Fix For: 3.x Attachments: paging-test.py We noticed an anomaly in paged results while testing against 3.0.0-alpha1. It seems that unbounded selects can return rows repeated at page boundaries. Furthermore, the number of repeated rows seems to dither in count across consecutive runs of the same query. Does not reproduce on 2.2.0 and earlier. I also noted that this behavior only manifests on multi-node clusters. The attached script shows this behavior when run against 3.0.0-alpha1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
